init static method
Initialize asset tree from AssetManifest.json
Implementation
static Future<void> init() async {
if (_initialized) return;
final manifestContent = await rootBundle.loadString('AssetManifest.json');
final Map<String, dynamic> manifestMap = json.decode(manifestContent);
_root = AssetFolder('assets');
for (final path in manifestMap.keys) {
_addPath(path.substring("assets/".length));
}
_initialized = true;
}